Coversng for



(No Model.)

G. G. HICKS.

COVERING FOR STEAM BOILERS, am.

No. 294,780. PatentedMar. 11, 1884.

- end, said invention consl'stsln a shield or cov- UNITEn STATES IO HCE;

' GEORGE c nvnL'Au BIoKs, or onroAeQ LLmoIs.

covs'nme sou steamecissssgae.

srncrrrcn'rron forming-part of Letters ram: no. 294,780, dated March 11;, less. Application filed July 16, 1853. (1 10 model.)

To all whom it may concern:

Be it'known that I, GEORGE CLEVELAN HroKs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,' have invented certain ,ncwauduseful Improvements in Coverings for,Steam- Boilers, &c., of which I do declare the follow ing to be a full, clear, and exact description, reference being'had to the accompanying drawings, forming part of .this specification,

The present invention has-for its object to sonry', iron-work, and pipes thereof, and to so reduce the temperature of the working-rooms of such furnaces that it shall be less severe uponthe men employed therein.

1 7 4 To this end my IHVGIItIOH fiODSIStS, first, J21

applying. directly toimetallic heat-radiating surfaces, preferably by means of a soluble silicate, (waterglass) ashield or covering composed of a layer of asbestus or equivalent non conducting substance placed intermediately between two sheets of tin-foil or equivalent reflecting and non-radiating surfaces; and, secering for heat-radiating. surfaces, composed of a layer of asbestus'or equivalent non-conducting substance'faced with tinfoil.

In the accompanying drawings, Figure 1 is a perspective. view of my improved shield or covering, the component parts being partially separated for better illustration; and Fig.- 2 is a perspective view of a portion of a boilermy improved covering has been applied. a

The. body A of the shield or covering consists,..preferably, of a sheet of asbestus-board, to each face of which is firmly united by a suitable cement, preferably water-glass; (solu-.

ble silicate of soda or potash,) a sheet or coating'of tin-foil, B.. The action of this covering, when placed upon or adjacent to a'heat radiating surface, is as follows: The heat rays, striking first the polished surface of the nearest sheet of tin-foil,. are reflected therefrom, such heat as passes through the same by conductioii being opposed by the non-conducting. body of asbestus. The heat received by this non-conducting body A in radiating therefrom .avoid tarnishing the surface of the outer is reflected by the inner polished surface of theoutersheet of foil, and this foil, beingapoor. radiating substance, allowsbnt few of theheatrays to passtherefront. Although the covheated surface, the heat radiated from the outer face of the covering is scarcely appreciable, so that the loss by radiation is in great measurdprevented, and the temperature of the working-room is reduced much below that usual in furnace-rooms. I

- A coveringconstructedas above described will not be injuriously affected by intense heat, and has the further advantage that it can be placed in direct contactwith metallic surfaces without the danger-of corrosion encountered when an unprotected covering of asbestus,

mineral wool, or the like is so applied. l While asbestus-is the preferred substance for'forming the body of the covering, I do not wish the invention to be understood. as restricted thereto, as itgis evident that straw: board. felt, wood veneer, or like non-conducting substance may, for many uses, be substituted therefor. I

- In cases, where the covering may be exposed to moisture-as, for example, about the joints of steam-pipesa cement of lead-pigment or, other water-proof material may be employed if desired, instead of the waterglass for uniting the tin-foil to the body. In the drawings the improved covering is' shown as applied to the masonry W, the steamdome and discharge-pipe X, the iron facingY, and the doors Z of a steam-boilerfurnace'; and 85 ,it will be readily understood that the attach- I ment maybe made in any approved manner.-

- In applying the invention to the heat-radiating surface, said shield or covering, formed as above descrlbed, is coated upon one face with water-glass cement, and is then placed upon the metallic s 1-.rfa'ce to be covered, and is pressed firmly thereon by means of a pad or rubber preferably faced with tin-foil to foil. When thus placed upon the metallic surface, the covering will effectually prevent the radiation of heat therefrom, will remain se-- curely'in place, will be uninjured during intense 'heat, and will avoid the danger of .corroo rosion incident to the direct attachment; of asbestos, mineral wool, -or the like, A

I am Well aware that highly-polished metallic surfaces possess the quality of reflecti ng rays of 5 heat, and the same is not to be understeodas of my invention, which consists, rather, inimpressing upon the usual non-conducting flexible packing of asbestus, straw-board, or the like, employed to protect steam-boilers, pipes, IO and other heat-radiating surfaces, the additional characteristics of a reflector and poor radiator, which advantages result from the close union with the covering of a material having these qualities in high degree, and, like 15 the covering, readily adapted to any irregularities of contour in the surfaces to be protected.

1 Having thus described my invention, what I claim as new, and desire to secure by Letters 20 Patent, is-' v 1. The combination, with theheet-radiating surface, of a protective covering therefor, the same consisting of alayer of asbestns or the like faced with tin-foil, substantially as described 2. The protective covering for heat-radiat- 2 5 ing surfaces, the same consisting of a layer of asbestus or the like having its face coated with tin-foil, substantially as described.

3. The protective covering for heat-radiating surfaces, the same consisting of a layer of 30 asbestus or the like having both of its faces coated with tin-foil, substantially as described.

In testimony whereof Ihzwe hereunto set my hand.

Geo. 1. FISHER, Jr., .lluvms H. PEIRCJ-Z. 

